Internal-combustion engines – Charge forming device – Having fuel vapor recovery and storage system
Patent
1995-08-17
1997-03-04
Moulis, Thomas N.
Internal-combustion engines
Charge forming device
Having fuel vapor recovery and storage system
F02M 2508, F02D 4114
Patent
active
056069553
ABSTRACT:
The apparatus is arranged with a duty control valve 21 in a passage 19 for purged gas, connected between a canister 16 which temporarily traps fuel vapor and an air-intake passage 23 of an engine 1. The valve 21 is controlled to open and close at predetermined interval and supplies the purged gas to the air-intake passage 23. The apparatus comprises an interval changing means for changing an ON-OFF interval of the valve 21 shorter than normal at the particular engine operating condition. Another apparatus equipped with a multiple cylinder engine comprises a cylinder selecting means for selecting a cylinder sucking in the largest volume of the purged gas, and a torque fluctuation preventing means for equalizing the combustion pressure in all cylinders of the engine.
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Moulis Thomas N.
Toyota Jidosha & Kabushiki Kaisha
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